#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

int main()
{
	int year, mon, day;
	while (scanf("%d%d", &year, &mon) != EOF)
	{
		switch (mon)
		{
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:
		{
				   day = 31;
				   break;
		}
		case 4:
		case 6:
		case 9:
		case 11:
		{
				   day = 30;
				   break;
		}
		case 2:
		{
				  if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
					  day = 29;
				  else
					  day = 28;
				  break;
		}
		}
		printf("%d\n", day);
	}
	return 0;
}